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MIC4682 Datasheet(PDF) 5 Page - Micrel Semiconductor

Part # MIC4682
Description  PRECISION CURRENT LIMIT SO-8 SUPERSWITCHER BUCK REGULATOR
PDF  15 Pages
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Manufacturer  MICREL [Micrel Semiconductor]
Direct Link  http://www.micrel.com
Logo MICREL - Micrel Semiconductor

MIC4682 Datasheet(HTML) 5 Page - Micrel Semiconductor

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October 2003
5
M0334-102203
MIC4682
Micrel
Typical Characteristics
T
A = 25°C unless otherwise noted.
0
10
20
30
40
50
60
70
80
90
0
0.4
0.8
1.2
1.6
OUTPUT CURRENT (A)
Efficiency
vs. Output Current
V
OUT = 5V
V
IN = 7.5V
V
IN = 12V
V
IN = 24V
V
IN = 30V
0
10
20
30
40
50
60
70
80
0
0.4
0.8
1.2
1.6
2
OUTPUT CURRENT (A)
Efficiency
vs. Output Current
V
OUT = 3.3V
V
IN = 5.8V
V
IN = 12V
V
IN = 24V
V
IN = 30V
0
10
20
30
40
50
60
70
80
0
0.4
0.8
1.2
1.6
2
OUTPUT CURRENT (A)
Efficiency
vs. Output Current
V
OUT = 2.5V
V
IN = 5V
V
IN = 6V
V
IN = 12V
V
IN = 30V
1
2
3
4
5
6
0
0.4
0.8
1.2
1.6
2
CURRENT LIMIT (A)
Output Voltage
vs. Current Limit
V
IN = 12V
R
ISET = 16.2k
Load =
Continuous
L = 68
µH
R3 = 10M
T
A = –40°C
T
A = 25°C
T
A = 60°C
1
2
3
4
5
6
0
0.4
0.8
1.2
1.6
2
CURRENT LIMIT (A)
Output Voltage
vs. Current Limit
V
IN = 24V
R
ISET = 16.2k
Load =
Continuous
L = 68
µH
R3 = 10M
T
A = –40°C
T
A = 25°C
T
A = 60°C
1
2
3
4
5
6
0
0.4
0.8
1.2
1.6
2
CURRENT LIMIT (A)
Output Voltage
vs. Current Limit
V
IN = 30V
R
ISET = 16.2k
Load =
Continuous
L = 68
µH
R3 = 10M
T
A = –40°C
T
A = 25°C
T
A = 60°C
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
10 15 20 25 30 35 40 45 50
R
ISET
(k
Ω)
Current Limit
vs. R
ISET
at T
J
= –40
°C
V
IN = 4V
V
IN = 5V
V
IN = 12V
V
IN = 24V
V
IN = 30V
V
IN = 34V
L = 68
µH
R3 = 10M
V
OUT = 1.0V (Pulsed Load)
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
10 15 20 25 30 35 40 45 50
R
ISET
(k
Ω)
Current Limit
vs. R
ISET
at T
J
= 25
°C
V
IN = 4V
V
IN = 5V
V
IN = 12V
V
IN = 24V
V
IN = 30V
V
IN = 34V
L = 68
µH
R3 = 10M
V
OUT = 1.0V (Pulsed Load)
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
10 15 20 25 30 35 40 45 50
R
ISET
(k
Ω)
Current Limit
vs. R
ISET
at T
J
= 85
°C
V
IN = 4V
V
IN = 5V
V
IN = 12V
V
IN = 24V
V
IN = 30V
V
IN = 34V
L = 68
µH
R3 = 10M
V
OUT = 1.0V (Pulsed Load)
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
10 15 20 25 30 35 40 45 50
R
ISET
(k
Ω)
Current Limit
vs. R
ISET
at T
J
= 125
°C
V
IN = 4V
V
IN = 5V
V
IN = 12V
L = 68
µH
R3 = 10M
V
OUT = 1.0V (Pulsed Load)
V
IN = 24V
V
IN = 30V
V
IN = 34V
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
4
8
12
16
20
24
28
32
INPUT VOLTAGE (V)
Short Circuit Current Limit
vs. Input Voltage at T
J
= 25
°C
L = 68
µH
R3 = 10M
V
OUT~0V (Pulsed Load)
R
ISET=20k
R
ISET=25k
R
ISET=30k
R
ISET=40k
R
ISET=50k
R
ISET=10k
R
ISET=15.8k
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
4
7 10 13 16 19 22 25 28 31 34
INPUT VOLTAGE (V)
Short Circuit Current Limit
vs. Input Voltage at T
J
= –40
°C
R
ISET=20k
L = 68
µH
R3 = 10M
V
OUT~0V (Pulsed Load)
R
ISET=30k
R
ISET=40k
R
ISET=50k
R
ISET=10k
R
ISET=15.8k
R
ISET=25k



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